In the next beta of SkyOS, users can look forward to seeing a completely re-designed Viewer. The new Viewer will take advantage of the powerful features of the SkyFS (derived from Haiku's BFS), including extremely fast searching and organizing of files, on-the-fly filtering of files and folders within the Viewer, fast insertion of meta-data into multiple files, and more. Update: Screenshots!

Distrubtion != derivation. The GPL explicitly states that bundling does not create a derived work. A problem would only exist if SkyOS created new icons using parts of the GPL'ed ones, without opening the source to those icons (SVG files).